How will marcellus shale be harnessed?

The fracking process destroys the shale formation through high pressure, creating tiny cracks and fissures in the rock, which release the gas so it can be conveyed to the Earth's surface through pipelines

Explanation:

The Marcellus shale is a middle-aged Devonian sedimentary rocks and is found in North America and is named for a distinct outcrop near the village of New York, and extends to the Appalachian basins. It consists of the black shale and limestone beds and concentration of iron pyrite, and like most shells, it spits easily along the bedding planes. The total organic content of this shale ranges from 1 to 11 %and contains enough carbon to support combustion and the organic-rich shale has bituminous contents.

The answer would be plant growth.